Learn how to use FluentValidation with the Options Pattern in ASP.NET Core to validate configuration at startup, providing a robust alternative to Data Annotations for complex scenarios. The integration includes implementing custom IValidateOptions, creating extension methods, and ensuring validation through the ValidateOnStart method. This validation process helps catch configuration errors early, improving application reliability.
Table of contents
Why FluentValidation Over Data Annotations?Understanding the Options Pattern LifecycleCommon Configuration Failures Without ValidationSetting Up the FoundationCreating a FluentValidation ValidatorBuilding the FluentValidation IntegrationHow the FluentValidation Integration WorksCreating Extension Methods for Easy IntegrationRegistering and Using the ValidationWhat Happens at Runtime?Working with Different Configuration SourcesTesting Your ValidatorsSummarySort: